/* roulang page: index */
:root {
      --primary-purple: #7B2FF7;
      --primary-red: #E94057;
      --accent-cyan: #00E5FF;
      --deep-gray: #0F0F1A;
      --cold-white: #F4F4F9;
      --bg-light: #FAFAFC;
      --card-white: #FFFFFF;
      --dark-bg: #0B0B12;
      --text-main: #1A1A2E;
      --text-muted: #5A5A72;
      --border-light: #E8E8EF;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(123,47,247,0.12);
      --radius-card: 16px;
      --radius-btn: 50px;
      --transition-smooth: 0.3s cubic-bezier(0.25,0.8,0.25,1.2);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }
    h1, h2, h3, h4 {
      font-weight: 600;
      letter-spacing: -0.02em;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    /* 自定义容器微调 */
    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航栏悬浮胶囊 */
    .navbar-capsule {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 720px;
      background: rgba(15, 15, 26, 0.75);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: 60px;
      padding: 8px 24px;
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 8px 24px rgba(0,0,0,0.25);
    }
    .nav-logo {
      font-weight: 700;
      font-size: 20px;
      color: white;
      letter-spacing: 1px;
      background: linear-gradient(135deg, #7B2FF7, #E94057);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-right: 20px;
    }
    .nav-links {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-size: 15px;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.25s ease;
    }
    .nav-links a:hover {
      color: var(--accent-cyan);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .mobile-bottom-nav {
      display: none;
    }
    /* Hero 区域 */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #0B0B12 0%, #1A1A2E 100%);
      position: relative;
      overflow: hidden;
      padding-top: 100px;
    }
    .hero-bg-texture {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      z-index: 0;
    }
    .particles {
      position: absolute;
      width: 100%;
      height: 100%;
      z-index: 1;
    }
    .particle {
      position: absolute;
      background: rgba(0,229,255,0.3);
      border-radius: 50%;
      animation: float 6s infinite ease-in-out;
    }
    @keyframes float {
      0% { transform: translateY(0px) scale(1); opacity: 0.3; }
      50% { transform: translateY(-30px) scale(1.2); opacity: 0.6; }
      100% { transform: translateY(0px) scale(1); opacity: 0.3; }
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .hero-text {
      flex: 0 0 55%;
      color: white;
    }
    .hero-title {
      font-size: 56px;
      font-weight: 700;
      line-height: 1.1;
      margin-bottom: 24px;
      animation: fadeUp 0.8s ease-out;
    }
    .hero-subtitle {
      font-size: 18px;
      font-weight: 400;
      color: rgba(255,255,255,0.8);
      margin-bottom: 36px;
      max-width: 500px;
    }
    @keyframes fadeUp {
      0% { opacity: 0; transform: translateY(30px); }
      100% { opacity: 1; transform: translateY(0); }
    }
    .btn-primary-grad {
      background: linear-gradient(135deg, #7B2FF7, #E94057);
      border: none;
      color: white;
      font-weight: 600;
      padding: 14px 36px;
      border-radius: 50px;
      transition: 0.3s ease;
      box-shadow: 0 4px 15px rgba(233,64,87,0.3);
    }
    .btn-primary-grad:hover {
      background: linear-gradient(135deg, #8B3FFF, #F05067);
      box-shadow: 0 0 20px rgba(233,64,87,0.6);
      transform: translateY(-2px);
    }
    .btn-outline-cyan {
      background: transparent;
      border: 2px solid var(--accent-cyan);
      color: var(--accent-cyan);
      font-weight: 600;
      padding: 14px 36px;
      border-radius: 50px;
      transition: 0.3s ease;
      margin-left: 16px;
    }
    .btn-outline-cyan:hover {
      background: rgba(0,229,255,0.1);
      color: white;
    }
    .hero-visual {
      flex: 0 0 45%;
      text-align: right;
    }
    .hero-visual img {
      max-height: 450px;
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    }
    /* 通用板块标题 */
    .section-title {
      font-size: 40px;
      font-weight: 600;
      margin-bottom: 16px;
      color: #0F0F1A;
      text-align: center;
    }
    .section-subtitle {
      color: #5A5A72;
      text-align: center;
      margin-bottom: 60px;
      font-size: 18px;
    }
    section {
      padding: 100px 0;
    }
    /* 核心优势卡片 */
    .advantage-card {
      background: var(--card-white);
      border-radius: 16px;
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
      border: none;
      text-align: center;
    }
    .advantage-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .icon-wrap {
      width: 64px;
      height: 64px;
      margin: 0 auto 20px;
      color: #7B2FF7;
      font-size: 40px;
      transition: transform 0.3s;
    }
    .advantage-card:hover .icon-wrap {
      transform: rotate(5deg) scale(1.05);
      color: #E94057;
    }
    /* 功能分组交替 */
    .feature-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .feature-text {
      flex: 1;
    }
    .feature-img {
      flex: 1;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 20px 35px rgba(0,0,0,0.08);
    }
    /* 场景卡片 */
    .scene-card {
      background: white;
      border-radius: 16px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
    }
    .scene-card:hover {
      transform: translateY(-6px);
    }
    .scene-img {
      border-radius: 12px;
      overflow: hidden;
      margin-bottom: 20px;
      transition: transform 0.3s;
    }
    .scene-card:hover .scene-img {
      transform: scale(1.03);
    }
    /* 案例横向滚动 */
    .case-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 20px;
      scrollbar-width: thin;
      scrollbar-color: #7B2FF7 #E8E8EF;
    }
    .case-card {
      min-width: 280px;
      background: white;
      border-radius: 16px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    /* FAQ手风琴自定义 */
    .accordion-button {
      font-weight: 600;
      font-size: 18px;
      background: white;
      border: 1px solid #E8E8EF;
      border-radius: 12px !important;
      box-shadow: none;
    }
    .accordion-button:not(.collapsed) {
      background: white;
      color: #7B2FF7;
      border-left: 4px solid #7B2FF7;
    }
    /* CTA深色区 */
    .cta-dark {
      background: #0B0B12;
      color: white;
    }
    .input-capsule {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: 50px;
      padding: 12px 24px;
      color: white;
      width: 100%;
      max-width: 400px;
      outline: none;
    }
    .input-capsule:focus {
      border-color: #00E5FF;
    }
    footer {
      background: #0B0B12;
      color: rgba(255,255,255,0.7);
      padding: 60px 0 20px;
    }
    @media (max-width: 1024px) {
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
      .hero-text, .hero-visual {
        flex: 0 0 100%;
      }
      .hero-visual {
        margin-top: 40px;
      }
    }
    @media (max-width: 768px) {
      .navbar-capsule {
        display: none;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(15,15,26,0.85);
        backdrop-filter: blur(20px);
        border-radius: 40px;
        padding: 8px 20px;
        z-index: 1000;
        gap: 28px;
      }
      .mobile-bottom-nav a {
        color: white;
        font-size: 20px;
      }
      .hero-title {
        font-size: 36px;
      }
      .section-title {
        font-size: 32px;
      }
      .feature-row {
        flex-direction: column;
      }
    }